I'll send $25 USD via paypal to anyone who can get intel_extreme to work and provide native resolution support on the N10 graphics chipset (deviceid 0xa001) of my Atom box. Consider this a "mini-bounty" of sorts - or at the very least, a thank you gift :)

The GMA3150 is integrated with the Atom. The N400 and D4/500 datasheets at (1) contain some information about the GMA3150 control register, which seems to be compatible to the G33's.
The changeset that adds support for the GMA3150 to the Linux driver can be found at (2). This might contain some hints as to what needs to be changed.

The naming is a bit inconsistent (DISPLAY_PLL_IGD_POST1_DIVISOR_MASK vs. DISPLAY_PLL_N_DIVISOR_MASK_IGD -- the latter should be DISPLAY_PLL_IGD_N_DIVISOR_MASK instead), but the rest looks like the necessary evil. Nice work Brecht!